Heater for incubators.



PATBNTED OCT. 16,1190@ i o. P, SHOEMA'KBR. HEATER PoR INCUBATORS.

APPLICATION FILED NOV. 21. 1905.v

.Ufzaww/wwffgw Attorneys n UNITED sTATEs PATENT OFFICE.

ORLANDO SHOEMAKER, OFl CLAY CENTER, NEBRASKA. l HE/iTr-:FrFon INcuBAToRs. l

To all whom it may concern/b Be it known that I, ORLANDO P. SHOE- MAKER,a citizen of the United States, residing at Clay Center, in the county4oi Clay and StateofNebraska, haveinvented a new and useful vHeateror'lncubator's, of which the elements of the apparatus.. l l

' A further object of the invention is to obtain a maximum-radiatmg-surface for heatzo ingthe Water Without increasing the size ofthe heater andto obtain an effective circulation of the Water. v

Another object of the invention is toeffect an automatic control ofthefheater by the z 5 temperature of the chamberto beheated in orderthat said chamber may be maintained ata uniform temperatureirrespectivel of the riserand fall ofthev temperature externally ofthechamber.- l

It is-alsoproposed to enable the convenient adjusting -ofthe re datingmechanism Without dismantlingthe eater.

,Withtheseand other 'objects in viewthe present invention consists inthe combina- 3 5 tion and arrangement of arts, as Will be `hereinaftermore fully'descri ed, shown in the accompanying drawin s, 'andparticularly pointed out in the appen edclaims, it being understoodlthat changes in the fo rm, proportion, 4o' size', and'minordetailsv maybe made Within the' scope of the `claims Without departing from tliev's)iiit or sacrificing any of the advantaeesfo the invention. In thedrawings, Figure lis ajperspective v view of a heater ofthe resentinvention applied .t'kan incubator', t V`e top of .the incubator beinremoved anda portion of the case thereof.` eing-brol{e1;\J-. avvay.,toldisclose the regulatingmeans. .Fi .'2'is anenlargedzver- 5o ticalsectional view oft elboiler'and heatingy drum thereforf Fig. 3 isadetail'cross-sec-'l tional view ofthe boiler. 'f

` Like characters of reference designate cerrespending .p rlts:ineach-of the. severalgur'es n b'oilerand .its lower end dis osedbelouTYthe For an adequate understanding'ot the Specification of LettersPatent. l unmanned Noventa 21,1905. sprinnazeafioa l Patented oct. 1e,190e.

plication and operation of the present inventin a conventional-form ofincubator has been shown at 10 in Fig. ofthedrawings, the top oftheincubator being omitted..

The present heating system includes aradiator 11, which extends aroundthe inner Walls o f the incubator adjacent the topthereof, sofas tocarrythe heated Water entirely around the incubator and into -thecorners thereof. Ordinarily the box or case di an incubator is s uare orrectangular in'forni,

and therefore t ie radiator is made up of four successively-connectedlpipe or iue `sections arranged inthe formvof a rectangle. A crossilue16 connects opposite sides of the radiator. Communication etween thecross-iiuefand each adjacent side of the radiator isf' had tor from thatside which is connected directly .to the heater for the purpose ofcompensating for the reduction of the temperature of the water at itsremotest point from the heater. That side ofthe radiator which is tobeconnected to the heater is provided about mid- Way of its ends With aplug or partition 15, and atthe opposite sides ofthis partitioninductionand eduction pipes 13 and14 lead outwardly from the radiator and passthrough suitable openings formed in the adjacent side of the incubator.

The Water-heater incl des a boiler. made up of outer andinner concentricshells 18 and 19, the annular space between the shells beving closed latits upper and lower `-ends by means of. top and 'bottom piecesf21 and22.

`A duct 6r passage 23 is located Withinthe annular Water-space 20, theupper end of the passage being 'closed by the top 21 and its ower o enend 'being adjacent the bottom of the boi-er. The induction-pipe 14pierces the outer boiler-'shell 18, in communication `AWith the upper`portion of the duct 23, While; the eduction-pipe '13 communicatesdirectly` jwith the" interior Ao1 the boiler.y It'willl here beexplained that the'boiler'is suspended from the pipes 13 and 14. Asuitable'filling- "spout24 is providedl in one side of theboileradjacent its top andhas a suitable closure V25.' A

Independent of theboiler and concentrically embracing'- the same isashell 30, having itsopen `upper end terminating shortof the lo'vver endof the boiler and aving a bottom 3 1 pierced by an upwardly-taperedopen-ended lamp-chimney l29, which rises within the boiler and projectsa suitable distance below the bottom of the shell. 'This chimney isadapted to fit the burner 28 of a lamp 27, and

` heater for applying and removing a lamp. It

willzhere be explained that the lamp carries the chimney 29 and theshell 30, so that when .the lamp is removed the shelll and chimney areremoved therewith `without disturbing theboiler.

-When the lamp is burning, the heated prod-v ucts of combustion willpass up through the chimney and the central hot-air flue of the boiler,defined by the inner shell 19, while some of the products of combustionwill pass upwardly through the annular Hue-passage formed by the 4outershell 18 of the boiler and the fine-shell 30, whereby the boiler hasinner and outer heating-surfaces, which materially remotes the heatingof water. It will here e e lained that when vthe' water b'ecomes heatecirculation takes place from the boiler through the pipe 13A into theradiator and then back through the pipe 14 into the duct 23 and thencedownwardly to the bottom of y the boiler, whereby the relatively 'coolwater 1s returned into the bottom of the boiler, so as to insure theproper circulation of the water.

It is proposed to regulate the paths of theproducts of combustion by thetemperature within the chamber defined by the walls of the incubator,and this will be accomplished in the following manner: A damper 33 isprovided for the top of the hot-air fiue tluough the boiler, and this'damper is carried by the -long end portion of avertically-swinginglever 34, fulcrumed adjacent its other end upon a bracket 36, projectingoutwardl from the adjacent side of the incubator. threaded link 43V isloosely hung from the short end of the lever and passes loosely througha perforation in the free end of one arm 41 of a bellcrank klever whichvwb'rks through an opening in the ,adjacent wall of the incubator. Uponthe lowerend of the link 43 there is an adjusting-nut 43a, which bearsagainst the lower side of the arm 41 of the bell-crank lever.

The bell-crank lever works in a tubular sheathor case of the outer endwith an external annular flange 44, rigidly connected to the outer faceof the in- 42, which pierces the adjacent wall cubator by means ofsuitable fastenings.

arm 41 works.

The outer closed end of the tubular sheath is prvidedwith a verticalslot 4.5, in which the At the point of juncture of the arms -39 and 41vof, the bell-crank lever saidlever is made substantially circular or inthe form of a disk which has a working fit in incubator and is providedupon its the inner end of the sheath within the incubator and carriesupper andlower spaced substantially horizontal thermostatic 'disks 38,which are hollow and contain a suitable liquid, which expands quicklyunder the infiuence of heat. The lower free lend of the arm 39 of thebell-crank lever engages the upper thermostatic disk, whereby the leveris actuated by the rise and fall of the thermostatic members, due to theexpansion and ,contraction, and hence the damper 33 will be raised andlowered accordingly. v

Whenthe lamp is first lighted, the thermostatic members 38'are in theirnormal conditions, whereby the arm 39 of the bell-crank le- Ver will beat its lower limit and the damper 33 will be closed. In this conditionthedraft of.

the lam is indirect-that is to say, the heated. prol uctsy of combustionvpasspupwardly from the'himney 29v into` thej'gboiler flue, thence downinto the'drum orshell 31 and upwardly through the latteratfthle outsideof the boiler, whereby the inner'anvd outer surfaces of the boiler aresubjected to' theheated products of combustion, so as to quickly anduniformly heat the Water.` As the water becomes heated it circulatesthrough theradiator and back into theboiler, thereby heating thecompartment 10 by radiation. .As the temperature riseswithin thecompartment the thermostatic members 38 expand, therebytiltingdownwardly the arm 41 of the bellcrank lever,and thus lifting thedamper 33, whereby the indirect draft of the lamp is gradually reduceduntil the temperature reaches a predetermined high degree, when thedamper will be entirely open and the draft will be direct upward andoutward through the open top of the boiler-Hue. When the damper isentirely open, .the heated products of combustion escape quickly throughthe top of the boiler-flue without materially heating the boiler. Hencethe boiler cools off and the temperature in the compartment 10 isreduced. As the action of the regulator is automatic, the temperature ofthe chamber or compartment is maintained substantially uniform.

From the foregoing description it will be understood that the boiler andthe thermostatic regulator are, carried by the incubator, While theheating-drinn 30 and the chimney 29 are carried by the lamp. Hence theheating-drum is removed with the lamp when the latter is to befilledWithout disturbing the boiler and the regulator. It will also be notedthat .by having thel boiler provided with a central heat-flue'theavailable'heating-surface of the boiler is ractically doubled, therebyinsuring a uic and uniform `heating of the water, as' al arts thereofare subjected to th heat of the amp.

IOC

IIO

' 1. -A Water-heater comprising a boiler having an open-endedheating-flue passing therethrough, outlet and return pipes for theboiler, a passage Within the boiler return-pi e to the bottom of theboiler, a

drum em' racin and spaced from the boiler to forman ann ar flue-space,the drum being independent of the boiler with its upper end open and itslower end closed, and a chimney piercingthe bottom of the drum andentering the heat-flue of the boiler. A

2. Awater-heater comprising a boiler having an open-ended heating-fluepassing therethrough, outlet and return pi es for the boiler, a passagewithin the boiler eading from the return-pi e to the bottom of theboiler, a drum en racin -and spaced from the .boiler to form an annu arHue-space, the drum bein independent of the boiler with its up er endopen and its lower end closed, a c imney p1ercing the bottom of the drumand entering the heat-Hue of the boiler,l a damper for the upper end ofthe heat-flue of the boiler, and a thermostatic lregulator connectedwith the damper.

3. A water-heater comprising a boiler having a heating-liuc passingtherethrough, outlet and inletpipes communieating with the boiler, adrum independent of and embracing the boiler with an annular line-spacebetween l the boiler and the drum, the top of the drum being open andits bottom being closed, and a chimney piercing the bottom of the drumand entering the ue of the boiler.

4." A water-heater comprising a boiler having a heating-Hue passingtherethrough, outlet and inlet'pipes communicating with the boiler, adrum independent of and embracing the boile with an annular Hue-spacebetween the boiler and the drum, the top ofthe drum being open and itsbottom being closed, a

- chimney piercing the bottom of the drum and eading from the,

entering the iue of the boiler, a damper for the open top of theboiler-Hue, and a t ermostatic regulator connected to the'damper.

The combination with a chamber to be heated; of a radiator therein, aboiler connected with the radiator and having a heating-flue passingtherethrough, outlet and inlet pipes communicating withvthe boiler, adrum independent of and embracing the boiler with an annular flue-spacebetween the boiler and the drum, the top ofthe drum being open and itsbottom being closed, a chimney piercin the bottom of the drum andentering the ue of the boiler, a damper for the open top oftheboiler-flue, a bell-crank lever plvotally mounted within the casing, anoperative connection between said lever and the damper, and a thermostatassociated with the inner .ortion of the lever.

6. he combination with a chamber to be heated, of a radiatortherein,inlet and outlet pipes extending from the radiator through one wallofthe chamber, a boiler supported by the pipes and provided with anupright heating-flue; passing therethrou h, a lamn supported below theboiler, a chimney upon the lamp rising into the boiler-flue, a drumsupported by the chimney independent of the boller and surrounding thesame to define an annular iiue-space between the boiler and the drum,the bottom of the drum being closed and its to being open, a damper forthe top of the boiler-flue, a thermostat Within thej chamber, and aconnection between the ther- ORLANDO P. SHOEMAKER.

Witnesses:

OTTO BARTH, L, F. FRYAR.

